1. Mollusca
The mollusks
One of the most diverse animal
groups

2. Bilateral
Coelom-fluid-filled body cavity; the space
where the major organs are located

3. Radula - a tongue with plates or “teeth” on it;
used to scrape food into the mouth

4. Mouth and Anus; called a “through gut”
Complete stomach and digestive system

5. No skeleton; cavity gives shape; shell protects
Live everywhere!
“Foot” for moving/burrowing
Squid use jet propulsion (tentacles); VERY fast

6. Name means “soft bodied”
There are 3 types:
Bivalves
Gastropods
Cephalopods

7. Have a nervous system
Ganglia
Nerve cords
Have an “open circulatory system”
Blood is pumped
to the spaces and
diffuses through the
cells

8. Many are used for food by man

9. Annelida
The segmented worms

10. Bilateral
Tissues
Organs; organ systems

11. True body cavity
True coelom

12. Mouth and anus; through
gut
Eat a wide range of material
Fertilize soil
Leeches have suckers and
feed on blood

13. Reproduce sexually
Are found nearly everywhere

14. Complex nervous system
Nerve cords AND a brain!!!!!!!!!

15. Closed circulatory system!!!
Blood is pumped through the body through a
complete system of tubes

16. Creep along using muscles

18. Nobody likes me, everybody hates me
I’m gonna eat some worm (er er)s
Big fat juicy ones, little tiny squirmy ones
Oh see how they do squirm (irm irm)
First you bite the heads off,
and then you suck the guts out,
and then you throw the skins away(a a)
Nobody knows how I eat worms
twenty-four hours a day (a a).